ASTM E518/E518M-21

Standard Test Methods for Flexural Bond Strength of Masonry

SIGNIFICANCE AND USE
4.1 These test methods are intended to provide simplified and economical means for gathering comparative research data on the flexural bond strength developed with different types of masonry units and mortar or for the purpose of checking job quality control (materials and workmanship).
Note 1: These test methods are not intended for use in establishing design stresses. For this purpose, Test Methods C1717 should be used.
SCOPE
1.1 These test methods cover determination of the flexural bond strength of unreinforced masonry assemblages. Two procedures are provided:  
1.1.1 Test Method A—Simply supported beam with third-point loading.  
1.1.2 Test Method B—Simply supported beam with uniform loading.  
1.2 These test methods cover the application of the tests using either inch-pound or SI units. The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 31-May-2021
• ICS: 91.060.10 - Walls. Partitions. Facades
• Technical Committee: C15 - Manufactured Masonry Units
• Drafting Committee: C15.04 - Research

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E518/E518M − 21
Standard Test Methods for
1
Flexural Bond Strength of Masonry
This standard is issued under the fixed designation E518/E518M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* Simple Beam with Third-Point Loading)
C140 Test Methods for Sampling and Testing Concrete
1.1 These test methods cover determination of the flexural
Masonry Units and Related Units
bond strength of unreinforced masonry assemblages. Two
C270 Specification for Mortar for Unit Masonry
procedures are provided:
C778 Specification for Standard Sand
1.1.1 Test Method A—Simply supported beam with third-
C1232 Terminology for Masonry
point loading.
C1717 Test Methods for Conducting Strength Tests of Ma-
1.1.2 Test Method B—Simply supported beam with uniform
sonry Wall Panels
loading.
E4 Practices for Force Verification of Testing Machines
1.2 These test methods cover the application of the tests
E575 Practice for Reporting Data from Structural Tests of
using either inch-pound or SI units. The values stated in either
Building Constructions, Elements, Connections, and As-
SI units or inch-pound units are to be regarded separately as
semblies
standard. Within the text, the inch-pound units are shown in
brackets. The values stated in each system may not be exact
3. Terminology
equivalents;therefore,eachsystemshallbeusedindependently
3.1 For terms used in these test methods, refer to Terminol-
of the other. Combining values from the two systems may
ogy C1232.
result in nonconformance with the standard.
1.3 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 These test methods are intended to provide simplified
responsibility of the user of this standard to establish appro-
and economical means for gathering comparative research data
priate safety, health, and environmental practices and deter-
on the flexural bond strength developed with different types of
mine the applicability of regulatory limitations prior to use.
masonry units and mortar or for the purpose of checking job
1.4 This international standard was developed in accor-
quality control (materials and workmanship).
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the NOTE 1—These test methods are not intended for use in establishing
design stresses. For this purpose, Test Methods C1717 should be used.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5. Apparatus
Barriers to Trade (TBT) Committee.
5.1 Testing Machine, conforming to the requirements of
2. Referenced Documents Practices E4.
2
2.1 ASTM Standards:
5.2 Test Method A—The third-point loading method is
C67 Test Methods for Sampling and Testing Brick and
illustrated in Fig. 1.The minimum span between supports shall
Structural Clay Tile
not be less than 2.5 multiplied by the average depth of the
C78 Test Method for Flexural Strength of Concrete (Using
specimen. The distance between each support and the adjacent
distributed point load shall be one-third of the span length
63 mm [0.1 in.]. Steel rods with a maximum diameter of 25
1
These test methods are under the jurisdiction of ASTM Committee C15 on
mm [1 in.] shall be used to support the specimen and apply the
Manufactured Masonry Units and are the direct responsibility of Subcommittee
load. The steel rods shall extend over the full width of the
C15.04 on Research.
specimen and shall have the same nominal diameter.
Current edition approved June 1, 2021. Published January 2016. Originally
NOTE 2—The loading apparatus is intended to be similar to that used in
approved in 1974. Last previous edition approved in 2015 as E518 – 15. DOI:
Test Method C78 to reduce the need for redundant testing equipment.
10.1520/E0518_E0518M-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.3 Test Method B—The uniform loading method is illus-
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
trated in Fig. 2. The minimum span between supports shall not
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. be less than 2.5 multiplied by the average depth of the
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E518/E518M − 21
FIG. 1 The Third-Point Loading Meth
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E518/E518M − 15 E518/E518M − 21
Standard Test Methods for
1
Flexural Bond Strength of Masonry
This standard is issued under the fixed designation E518/E518M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 These test methods cover determination of the flexural bond strength of unreinforced masonry assemblages. Two procedures
are provided:
1.1.1 Test Method A—Simply supported beam with third-point loading.
1.1.2 Test Method B—Simply supported beam with uniform loading.
1.2 These test methods cover the application of the tests using either inch-pound or SI units. The values stated in either SI units
or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The
values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
Combining values from the two systems may result in nonconformance with the standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C67 Test Methods for Sampling and Testing Brick and Structural Clay Tile
C78 Test Method for Flexural Strength of Concrete (Using Simple Beam with Third-Point Loading)
C140 Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
C270 Specification for Mortar for Unit Masonry
C778 Specification for Standard Sand
C1232 Terminology for Masonry
C1717 Test Methods for Conducting Strength Tests of Masonry Wall Panels
E4 Practices for Force Verification of Testing Machines
E72 Test Methods of Conducting Strength Tests of Panels for Building Construction
E575 Practice for Reporting Data from Structural Tests of Building Constructions, Elements, Connections, and Assemblies
1
These test methods are under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and are the direct responsibility of Subcommittee C15.04 on
Research.
Current edition approved Dec. 1, 2015June 1, 2021. Published January 2016. Originally approved in 1974. Last previous edition approved in 20102015 as
E518 – 10.E518 – 15. DOI: 10.1520/E0518_E0518M-15.10.1520/E0518_E0518M-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E518/E518M − 21
3. Terminology
3.1 For terms used in these test methods, refer to Terminology C1232.
4. Significance and Use
4.1 These test methods are intended to provide simplified and economical means for gathering comparative research data on the
flexural bond strength developed with different types of masonry units and mortar or for the purpose of checking job quality control
(materials and workmanship).
NOTE 1—These test methods are not intended for use in establishing design stresses. For this purpose, Test Methods E72C1717 should be used.
5. Apparatus
5.1 Testing Machine, conforming to the requirements of Practices E4.
5.2 Test Method A—The third-point loading method is illustrated in Fig. 1. The minimum span between supports shall not be less
than 2.5 multiplied by the average depth of the specimen. The distance between each support and the adjacent distributed point
load shall be one-third of the span length 63 mm [0.1 in.]. Steel rods with a maximum diameter of 25 mm [1 in.] shall be used
to support the specimen and apply the load. The steel rods shal
...